Automatic firearm



Jan. 1925- 1,521,676

RUDOLF V. FROMMER AUTOMATIC FIREARM Filed Aug. 25, 1921 3 Sheets-Sheet l IICUQlT/ZOL jivozvfnommap,

Jan. 9 5- 1,521,676

RUDOLF V. FROMMER AUTOMATIC FIREARM Filed Aug. 25, 1921 3 Sheets-Sheet 2 Jan. 1925- 1,521,676

' RUD OLF V. FROMMER AUTOMATIC FIREARM Filed Aug. 25, 1921 3 She ets-Sheet 5 I 121; fizz/W019 1f. vowfbwmmefl Patented Jan. 5, 1925.

STATES AUTOMATIC FIREARM.

Application filed August 25, 1921.

T 0 all whom it may concern:

Be it known that I, RUDOLF VON FROM- .nnn, a citizen of Hungary, residing at Budapest IX, Soroksari ut 158, in the county of Pest and Republic of Hungary, have invented certain new and useful Improvements in Automatic Firearms, of which the following is a specification.

The invention relates to automatic fire arms, which can be taken apart and put together again very easily and rapidly. By the special construction of their parts it is possible to manufacture with the same plant both types of tire arms, for instance in the case of a self-loading pistol, a pistol with a hammer and a hammerless pistol (that is, a pistol in which the hammer is hidden within it), which is of great advantage from the point of view of industrial production, more particularly as in the case of small arms for ordinary sale the difference in taste of the purchasers must be taken into account, which, has hitherto made it necessary for the manufacturer, who for instance wished to supply pistols with and without an external hammer, to provide two different, very extensive and costly plants, each of which meant the installation of several hundreds of machine tools and as many special machines, special tools and templets.

In the accompanying drawings one constructional form of the the arm forming the subject-matter of the invention is shown in both types, which can be made from the [ire arm by means of the component parts in question, which alters the type. I

Fig. 1 shows the assembled tire arm 1n section,

Fig. 2 is a horizontal section of Fig. l on the line AB,

Figs. 3 and 4 show the slide inside and front elevation,

Figs. 5 and 6 show the breech piece in side and front elevation,

Figs. 7 and 8 are the side and front elevation of the barrel,

Figs. 9 and 10 show a detail in section and in back elevation,

Fig. 11 is a plan View of the stock,

Figs. 12 and 13 show the other type of fire arm corresponding to Figs. 1 and 2,

Fig. 14 shows a detail of the second type and Serial No. $95,179.

Fig. 15 is a side view of the second type.

011 the part 1 of the stock the barrel 2 is mounted by the tongues 3 slipping into the corresponding grooves l in the stock. The slide 5, which is bored through its entire length, surrounds the barrel with a sliding fit and is suitably guided on the stock, is slid on to the barrel from the front, the front guide rings 6 pressing the pres sure spring 8, which is mounted on the spring spindle 7.

The breech part 9 is slid from the back into the slide and is coupled on the latter by the cap 10 by means of a bayonet catch.

For this purpose tongues 11 are provided inside the cap (Figs. 9 and 10), which engage corresponding grooves 12 in the slide 5,, when the cap is in a certain position. The grooves are so arranged that, when the cap is turned out of its normal position, for instance through 90", is slid On to the slide and brought again into its normal position. the tongues 11 turn into the grooves 12 and fix the cap 10 on the slide. In order that the cap may be secured from being turned by mistake, the cartridge extractor 13 is provided with an extension 14, which is resilient or is spring actuated and is fitted with a pin 15. This pin projects into the bore 16 of the cap and thus prevents the cap from being turned.

On the part 1 of the stock a retaining member, for instance a latch 17, is mounted (Figs. 11 and 15), the upper end of which projects into a recess 18 in the slide. This recess 18 in the slide is so arranged that, in the backward position of the slidethe fire arm can only be taken apart in this position-it lies exactly opposite the latch. The latch 17 has a projection 20, which extends into the cartridge magazine 19 and is raised, after the last cartridge has been fired, by the feed plate 21, thus causing the latch to hold the slide in its backward position. The cap 10 may be given the form shown in Fig. 14 and in this case has a cowl 22, which encloses and completely surrounds the hammer 23 (Figs. 12 and 13), so that, when a cap of this type is used, the fire arm becomes a so-called hammer-less one, as the cock is completely hidden inside the tire arm (Fig. 15). This constructional form of the fire arm has the considerable advantage that, while retaining unaltered til rs rib almost all the component parts, the two different types of one fire arm may be made with one and the same plant.

The fire arm is taken apart in the following manner Z-* 1st. The slide is slid completely back, in which case-when the magazine is empty the latch 17 automatically locks the slide in its backward position, If there is no cartridge magazine in the fire arm, thelatch 17 is pushed by hand into the recess in the slide,

2nd. The pin 15 is pressed down and the cap 1(), turned "for instance through 90, is withdrawn from the slide.

3rd. By releasing the latch 17 the slide is pushed forward over the barrel through the action of the spring 8, the breech part 9, the barrel 2, the spring spindle T and the pressure spring all coming apart as loose parts. As will be seen. from the above the fire arm can be easily and completely taken apart by three simple operations, thus making it possible for it to be thoroughly cleaned and generally kept in order and more particularly by persons having little experience and who are not very strong.

The fire arm is assembled again just as simply in the reverse manner.

Haring now particularly described and ascertained the nature of my said invention and in what-manner the same is to be performed, I declare that what I claim is 2-- 1. In automatic fire arms the combination of a barrel and a. stock, engaging in each other by means of tongues and grooves, a slide bored through its entire length and adapted to surround the barrel by a sliding fit, means on the stock to guide the slide from the muzzle of the barrel to its backward position, a breech block adapted to be slid into the slide from the back, a cap con necting the breech block with the slide by means of a bayonet catch and a. cartridge extractor having an extension the end of which engages in a bore of the cap.

2. An automatic firearm including a stock, a barrel mounted on said stock, a

tongue and groove connection between the barrel and stock, a slide bored through its entire length, surrounding said barrel in a sliding lit and slidable thereon from the front, a breech block adapted to be slid into the slide from the rear, a cap uniting the block with the slide and connected with the latter by a bayonet joint closure, and ahammer lying outside of said cap.

3. An automatic firearm including a stock, a barrel mounted on said stock, a tongue and groove connection between the barrel and stock, a slide bored through its entire length, surrounding said barrel and slidable thereon from the front, a breech block adapted to be slid into the slide from the rear, a cap uniting the block with the slide and connected with the latter by a bayonet joint closure, and a cartridge extractor movable with said slide and provided at one end with an extension pin which projects through the aperture in said cap.

4. A firearm as claimed in claim 2 including a cartridge magazine provided with a carrier plate, a latching device for holding the slide in its rearward position, and means connecting the latching device with said carrier plate, whereby the carrier plate automatically actuates said latching device in order to dismount or re-mount the cap from or on the slide.

5. A firearm including a stock and barrel det-achably connected together, a slide bored through its entire length and adapted to be slid over the barrel from the front, a breech block adapted to be inserted into the slide from the rear, a firing pin carried by the breech block, a hammer adapted to actuate said firing pin, and interchangeable caps adapted to be locked to said slide for holding the breech block in the slide, one of said caps having a cowl to conceal the hammer.

In testimony whereof I ailix my signature in presence of two witnesses.

RUDOLF v. FROMMlll-l. Witnesses Ft'uiiir Lnnlin, FRANK Lony. 

